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INSTRUMENT SETUP–ALL MAVOWATT 2XX

INSTRUMENT SETUP – ALL MAVOWATT 2XX
The new MAVOWATT-  series offers both automatic and manual setup methods allowing users to be immediately productive, and to begin monitoring within minutes. Automatic setups are the quickest and easiest way to start monitoring in just a few steps. When connected to an energized circuit, the instrument automatically detects the circuit type, nominal voltage/current and displays them for review. The user can then set the current probe type and start monitoring immediately. The instrument will configure itself using triggers based upon the IEEE 1159 +/-  10% of nominal recommendations. Automatic setups are available for both Power Quality and Demand/Energy.
MAVOWATT200系列电能质量分析仪
Wizard setups are also available for the user to have complete control over the instrument’s  setup and triggering. The Wizard setup guides you step-by-step through each setup category. Wizard setup categories are: Probes/Scaling, Wiring Configuration, Nominal/Frequency, Monitoring Mode, Trigger Limits, and Finalize. Each category is randomly accessible and guides the user through the settings available in each setup screen. The instrument will also inform the user of potential setup errors, such as mismatches between the circuit type setting and the circuit type automatically detected.
MAVOWATT200系列电能质量分析仪
POWER QUALITY MEASUREMENT FUNCTIONS– ALL MAVOWATT 2XX 
The MAVOWATT 2XX instruments offer the latest in Power Quality, Demand and Energy measurement, and monitoring capabilities. Each model is Class A compliant with IEC61000-4-30:2008 and also supports EN50160:2009, IEEE 1159, IEEE 519, IEEE 1453 and IEEE 1459.

Data Acquisition 
Each MAVOWATT 2XX instrument samples every cycle of each voltage and current channel 512 times. Sampling is gapless, which means each voltage and current cycle is continuously sampled without gaps between cycles. Sampling is controlled by a Phase Locked Loop (PLL) circuit that is referenced to channel L1 (A) by default, with other references available. The PLL automatically adjusts the sampling rate to the power line frequency to ensure the instrument always acquires 512 evenly spaced samples per cycle for every channel. Therefore, any variation in the power line frequency adjusts the sampling rate accordingly. This translates to a sampling rate of 30.72KHz at 60Hz and 25.6KHz at 50Hz. Switchable Anti-Aliasing filters are available for strict compliance with IEC61000-4-30 Class A. Note that switching in such filters may limit the transient response of the instrument. The instrument is Class A compliant with Anti-Aliasing filters switched either on or off.

The data acquired by the above process is digitized by a 16-bit Analog to Digital (A/D) converter and is used as the foundation for all voltage, current and power measurements, and computations that are available in the instrument.  This technique of data acquisition is appropriate for low and medium frequency transients as defined by IEEE1159. At 512 samples per cycle, the time between samples is about 32μs at 60Hz and 39μs at 50Hz, which is adequate to record transient activity on most power systems. The MAVOWATT 270 and MAVOWATT 270 -400 have additional high speed transient circuitry for 1 microsecond transient detection.

 

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